Nitrogen Management Nitrogen Management for Heavy Clay Soils for Heavy Clay Soils David Dunn, Andrea David Dunn, Andrea Phillips, & Gene Stevens Phillips, & Gene Stevens University of Missouri University of Missouri Delta Center Delta Center This Research Made Possible This Research Made Possible by a Grant from Cotton Inc. by a Grant from Cotton Inc. and the Missouri State and the Missouri State Support Committee Support Committee
Nitrogen Management for Heavy Clay Soils. David Dunn, Andrea Phillips, & Gene Stevens University of Missouri Delta Center This Research Made Possible by a Grant from Cotton Inc. and the Missouri State Support Committee. University of Missouri Main campus. Kansas City. Columbia. St. Louis. - PowerPoint PPT Presentation
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Nitrogen Management for Nitrogen Management for Heavy Clay SoilsHeavy Clay Soils
David Dunn, Andrea Phillips, & David Dunn, Andrea Phillips, & Gene StevensGene Stevens
University of MissouriUniversity of Missouri
Delta CenterDelta Center
This Research Made Possible by a This Research Made Possible by a Grant from Cotton Inc. and the Grant from Cotton Inc. and the
Missouri State Support CommitteeMissouri State Support Committee
Columbia
Kansas City
Springfield
MU Delta CenterMU Delta Center
University of University of MissouriMissouriMain campusMain campus
Bootheel
PortagevillePortageville
St. Louis
Dr. Bobby PhippsDr. Bobby Phipps
Objective:Objective:
Develop a nitrogen managementDevelop a nitrogen management package for aggressively irrigated package for aggressively irrigated
cotton on heavy clay soils cotton on heavy clay soils in Missouri.in Missouri.
Methods and Materials:Methods and Materials:Site locationSite location
• Sharkey Clay soil Sharkey Clay soil – very fine, montmorillonite, thermic Vertic very fine, montmorillonite, thermic Vertic
HaplaqueptHaplaquept– pH: 7.1 P: 105 lb/a K 536 lb/a; pH: 7.1 P: 105 lb/a K 536 lb/a;
CEC: 28.6 meq/100grCEC: 28.6 meq/100gr– N recommendation: N recommendation: